CN105008824A

CN105008824A - System including high-side and low-side compressors

Info

Publication number: CN105008824A
Application number: CN201480010418.9A
Authority: CN
Inventors: 迈克尔·M·佩列沃兹奇科夫; 基里尔·M·伊格纳季耶夫
Original assignee: Emerson Climate Technologies Inc
Current assignee: Copeland LP
Priority date: 2013-02-26
Filing date: 2014-02-25
Publication date: 2015-10-28
Anticipated expiration: 2034-02-25
Also published as: US20190360488A1; WO2014134058A1; US9611849B2; CN107676260B; US20160258656A1; US9360011B2; US20140238066A1; CN105008824B; US10378539B2; US20140241909A1; CN107676260A

Abstract

A heat pump system may be operable to circulate fluid between first and second heat exchangers in a first direction in a heating mode and in a second direction in a cooling mode. The heat pump system may include a suction conduit, a low-side compressor and a high-side compressor. The low-side and high-side compressors may both be in fluid communication with the suction conduit.

Description

Comprise the system of high side compressors and low-pressure side compressor

The cross reference of related application

This application claims the U.S. Patent application No.14/189 submitted on February 25th, 2014,200 and on February 25th, 2014 submit to U.S. Patent application No.14/189, the priority of 248, and the U.S. Provisional Application No.61/769 submitted on February 26th, 2013, the rights and interests of 255.Whole disclosures of above-mentioned application are integrated with herein by reference.

Technical field

The disclosure relates to the system comprising high side compressors and low-pressure side compressor.

Background technology

This part provides and relates to background information of the present disclosure and may not for prior art.

Heat pump and other Working-fluid circulating systems comprise such fluid circuit: this fluid circuit has outdoor heat converter, indoor heat converter, one or more compressor of being arranged in the expansion gear between indoor heat converter and outdoor heat converter and working fluid (such as, cold-producing medium or carbon dioxide) being circulated between indoor heat converter and outdoor heat converter.Expect to realize compressor effectively and run reliably, can as required effectively and refrigeration and/or heating effect are provided efficiently with the heat pump guaranteeing to be provided with compressor.

Summary of the invention

This part provides general overview of the present disclosure, and be not to its all scope or institute characteristic comprehensively open.

In a form, present disclose provides a kind of system, this system can operate to and fluid circulated between the first heat exchanger and the second heat exchanger and comprises suction line, low-pressure side compressor, high side compressors and discharge line.Low-pressure side compressor can all be communicated with discharge line fluid with suction line with high side compressors.

In some embodiments, suction line fluid is connected to low-pressure side suction inlet and high-pressure side suction inlet.

In some embodiments, the housing of low-pressure side compressor is arranged between suction line and high-pressure side suction inlet, make fluid after leaving suction line, enter high side compressors before through the suction chamber that limited by housing.

In some embodiments, compressed fluid is supplied to low-pressure side suction inlet by the discharge outlet of high side compressors.

In some embodiments, high-pressure side suction inlet receives the fluid of being discharged by low-pressure side compressor.

In some embodiments, this system comprises the bypass manifold directly connected with high-pressure side suction inlet by suction line.

In some embodiments, high side compressors comprises the housing with the first entrance and the second entrance.First entrance can receive the fluid being in the first pressure from low-pressure side compressor.Second entrance can receive the fluid being in second pressure higher than the first pressure of discharging from low-pressure side compressor.

In some embodiments, high side compressors comprises compressing mechanism, this compressing mechanism limits at least one compression chamber, and at least one compression chamber described receives the fluid from the first entrance, and fluidly isolates with the fluid that high side compressors receives from the second entrance.

In some embodiments, when high side compressors and low-pressure side compressor with approximate absolutely capacity runs time, under the discharge chamber of high side compressors and the suction chamber of low-pressure side compressor are in roughly equal pressure.

In some embodiments, this system comprises oil-piping layout, and the oil sump of low-pressure side compressor is connected with the oil sump fluid of high side compressors by this oil-piping layout.In some embodiments, this system comprises control module, and this control module controls the valve be arranged in oil-piping layout.In some embodiments, control module can operate to the capacity of at least one controlled in high side compressors and low-pressure side compressor.

In some embodiments, this system comprises control module, when this system is run with heating mode, control module makes the one in low-pressure side compressor and high side compressors run, and stops the another one in low-pressure side compressor and high side compressors to be run.In some embodiments, control module can operate to when this system is run in a chiller mode, and the described another one in low-pressure side compressor and high side compressors is run, and stops the described one in low-pressure side compressor and high side compressors to be run.

In some embodiments, this system comprises outdoor unit and indoor unit, and this outdoor unit comprises the one in outdoor heat converter and low-pressure side compressor and high side compressors; Indoor unit comprises the another one in indoor heat converter and low-pressure side compressor and high side compressors.

In another form, present disclose provides a kind of compressor, this compressor can comprise housing, the first compressing mechanism and the second compressing mechanism.Housing can limit the first Room holding and be in the fluid of first fluid pressure.First compressing mechanism can comprise layout in the first chamber and compressed fluid expulsion is determined vortex to the dynamic vortex and first of first in the first Room being in first fluid pressure.Second compressing mechanism can comprise layout in the first chamber and limit suction inlet and discharge outlet the second dynamic vortex and second determine vortex.Suction inlet receivability is from the fluid being in first fluid pressure of the first Room.Discharge outlet the fluid being in second fluid pressure to be discharged from housing.

In some embodiments, housing limits the second Room being in second fluid pressure.In some embodiments, the second Room comprises discharge silencer.

In some embodiments, this compressor comprises power transmission shaft, and this power transmission shaft is arranged in the first chamber, and engages the first dynamic vortex and the second dynamic vortex gearingly.

In some embodiments, this compressor comprises motor, and this motor arrangement is in housing and drive the first dynamic vortex and second dynamic both vortexs.

In some embodiments, compressor comprises suction lead, and this suction lead extends through housing and engages the suction inlet of the first compressing mechanism, and the fluid being in the 3rd fluid pressure is sent to the first compressing mechanism.3rd fluid pressure can be less than first fluid pressure and second fluid pressure.

In some embodiments, housing limits single lubricant pool lubricant being supplied to both the first compressing mechanism and the second compressing mechanism.

In another form, present disclose provides a kind of heat pump, this heat pump can operate to and make fluid circulate along second direction in cooling mode along first direction between the first heat exchanger and the second heat exchanger in a heating mode.Heat pump can comprise suction lead, low-pressure side compressor and high side compressors.Low-pressure side compressor can all be communicated with suction lead fluid with high side compressors.

In some embodiments, heat pump comprises oil-piping layout and control module.The oil sump of low-pressure side compressor can be connected with the oil sump fluid of high side compressors by oil-piping layout.Control module can control the valve be arranged in oil-piping layout.

In some embodiments, heat pump comprises control module, this control module is when this heat pump runs with heating mode, one in low-pressure side compressor and high side compressors is run, and when heat pump runs with heating mode, stop the another one in low-pressure side compressor and high side compressors to be run.

In some embodiments, control module can operate into when heat pump runs in a chiller mode, described another one in low-pressure side compressor and high side compressors is run, and when heat pump runs in a chiller mode, stop the described one in low-pressure side compressor and high side compressors to be run.

In some embodiments, heat pump comprises outdoor unit and indoor unit.Outdoor unit can comprise the one in outdoor heat converter and low-pressure side compressor and high side compressors.Indoor unit can comprise the another one in indoor heat converter and low-pressure side compressor and high side compressors.

In some embodiments, heating mode comprises the first heating mode and the second heating mode, in the first heating mode; both high side compressors and low-pressure side compressor all run; in the second heating mode, high side compressors is run, low-pressure side compressor shutdown.

In some embodiments, refrigeration mode comprises the first refrigeration mode and the second refrigeration mode, and in the first refrigeration mode, high side compressors and low-pressure side compressor all run, and in the second refrigeration mode, low-pressure side compressor operating, high side compressors is shut down.

In some embodiments, during heating mode, the internal capacity of the one in high side compressors and low-pressure side compressor can act as the suction accumulator of accumulating hydraulic fluid within it.

In some embodiments, during refrigeration mode, the described internal capacity of the described one in high side compressors and low-pressure side compressor can act as the suction accumulator of accumulating hydraulic fluid within it.

In some embodiments, during refrigeration mode, the internal capacity of the another one in high side compressors and low-pressure side compressor can act as the suction accumulator of accumulating hydraulic fluid within it.

In another form, present disclose provides a kind of heat pump, this heat pump can run with the first heating mode and the first refrigeration mode.Heat pump can comprise: high side compressors, low-pressure side compressor and discharge conduit.High side compressors can comprise the first suction inlet and the first suction outlet.Low-pressure side compressor comprises the second suction inlet and the second suction outlet.Discharge conduit can receive the compressed working fluid from low-pressure side compressor in the first heating mode, and can receive the compressed working fluid from high side compressors in the first refrigeration mode.

In some embodiments, under the first refrigeration mode, low-pressure side compressor is communicated with the fluid of discharging between conduit and is prevented from, and under described first heating mode, and the fluid between described high side compressors with described discharge conduit is communicated with and is prevented from.

In some embodiments, under the second refrigeration mode, high side compressors is communicated with the fluid of discharging between conduit and is prevented from, and under the second heating mode, and the fluid between low-pressure side compressor with discharge conduit is communicated with and is prevented from.

In some embodiments, under the second refrigeration mode, low-pressure side compressor is communicated with the fluid of discharging between conduit and is prevented from, and under the second heating mode, and the fluid between high side compressors with discharge conduit is communicated with and is prevented from.

In some embodiments, during the first heating mode and during the first refrigeration mode, both low-pressure side compressor and high side compressors are all run, and, during the second heating mode and the second refrigeration mode, the one only in high side compressors and low-pressure side compressor is run.

In some embodiments, high side compressors is run during the second heating mode, and low-pressure side compressor is shut down during the second heating mode.

In some embodiments, low-pressure side compressor runs during the second refrigeration mode, and high side compressors is shut down during the second refrigeration mode.

In some embodiments, the second suction inlet of low-pressure side compressor receives the working fluid being in suction pressure.Low-pressure side compressor can comprise outlet, and the working fluid being in suction pressure leaves low-pressure side compressor through this outlet.

In some embodiments, heat pump comprises suction lead, and this suction lead is communicated with the second suction inlet fluid with the first suction inlet in the first heating mode with the first refrigeration mode.

In some embodiments, heat pump comprises the high pressure side conduit with the first control valve and the low-pressure side bypass manifold with the second control valve.Under the first heating mode, working fluid can flow through low-pressure side bypass manifold, and under the first refrigeration mode, working fluid is prevented from flowing through low-pressure side bypass manifold.Under the first refrigeration mode, working fluid can flow through high pressure side conduit, and under the first heating mode, working fluid is prevented from flowing through high pressure side conduit.

In some embodiments, during the first heating mode and during the first refrigeration mode, both low-pressure side compressor and high side compressors are all run.In some embodiments, during the second heating mode and the second refrigeration mode, the one only in high side compressors and low-pressure side compressor is run.Under the second heating mode, working fluid can flow through low-pressure side bypass manifold, and under the second refrigeration mode, workflow cognition is prevented from flowing through low-pressure side bypass manifold.Under the second refrigeration mode, working fluid can flow through high pressure side conduit, and under the second heating mode, workflow cognition is prevented from flowing through high pressure side conduit.

From the explanation provided herein, other application will become obvious.Description in this general introduction and concrete example are only intended to illustratively and are not intended to limit the scope of the present disclosure.

Accompanying drawing explanation

Accompanying drawing described herein only for selected embodiment but not the illustrative object of all possible implementation, and is not intended to limit the scope of the present disclosure.

Fig. 1 is the schematic diagram of operating fluid loop, comprises the sectional view of high side compressors according to principle of the present disclosure and low-pressure side compressor;

Fig. 2 is the partial section of the air intake passage according to principle of the present disclosure;

Fig. 3 is the schematic diagram comprised according to the high side compressors of principle of the present disclosure and another operating fluid loop of low-pressure side compressor;

Fig. 4 is the schematic diagram comprised according to the high side compressors of principle of the present disclosure and another operating fluid loop of low-pressure side compressor;

Fig. 5 is the schematic diagram comprised according to the high side compressors of principle of the present disclosure and another operating fluid loop of low-pressure side compressor;

Fig. 6 is the partial section comprised according to the first compressing mechanism of principle of the present disclosure and the compressor of the second compressing mechanism;

Fig. 7 is the schematic diagram comprised according to the high side compressors of principle of the present disclosure and the operating fluid loop of low-pressure side compressor;

Fig. 8 is the schematic diagram comprised according to the high side compressors of principle of the present disclosure and another operating fluid loop of low-pressure side compressor;

Fig. 9 is the schematic diagram comprised according to the high side compressors of principle of the present disclosure and another operating fluid loop of low-pressure side compressor; And

Figure 10 is the schematic diagram comprised according to the high side compressors of principle of the present disclosure and another operating fluid loop of low-pressure side compressor.

In a series of views of whole accompanying drawing, the parts that corresponding Reference numeral instruction is corresponding.

Detailed description of the invention

Now with reference to accompanying drawing, illustrative embodiments is more fully described.

Providing illustrative embodiments makes the disclosure will be detailed, and fully scope will be conveyed to those skilled in the art.Propose many details of the example of such as concrete parts, apparatus and method and so on to provide the detailed understanding to embodiment of the present disclosure.To be apparent that to those skilled in the art, and necessarily not use detail, illustrative embodiments to implement in a number of different ways and they not should be understood to be the restriction to the scope of the present disclosure.In some illustrative embodiments, known process, known apparatus structure and known technology are not described in detail.

Term is only for describing specific illustrative embodiments and and being not intended to limit as used herein.Unless the context, otherwise used hereinly do not indicate singulative or the noun of plural form should comprise plural form equally.Term " comprises " and " having " is inclusive and thus specifies the existence of described feature, entirety, step, operation, element and/or parts, but does not get rid of the existence or additional of one or more other features, entirety, step, operation, element, parts and/or its combination.Execution sequence unless specifically stated, otherwise method step described here, process and operation should not be construed as and must perform with particular order that is described or that illustrate.It will also be appreciated that and can use step that is additional or that substitute.

When mention element or layer " is positioned on another element or layer ", " being engaged to another element or layer ", " being connected to another element or layer " or " being attached to another element or layer " time, it can directly be positioned on other elements or layer, directly be engaged to, be connected to or coupled to other elements or layer, also can there is intermediary element or layer.On the contrary, when mentioning that element " is directly positioned on another element or layer ", " being directly engaged to another element or layer ", " being directly connected to another element or layer " or " being directly attached to another element or layer " time, there is not intermediary element or layer.Be used for the relation described between element other words (such as " and between " with " directly ", " adjacent " and " direct neighbor " etc.) should understand in a similar manner.What term "and/or" comprised that one or more is associated as used herein enumerate in part any one and all combinations.

Although can use at this terms such as first, second, third, etc. to each element, parts, region, layer and/or part be described, these elements, parts, region, layer and/or part not should limit by these terms.These terms can only be used for difference element, parts, region, layer or part and another region, layer or part.Unless context clearly states, otherwise order or order do not inferred in the term of such as " first " used herein, " second " and other numerical terms and so on.Therefore, the first element described below, parts, region, layer or part can be referred to as the second element, parts, region, layer or part, and do not depart from the teaching of illustrative embodiments.

Can use such as herein " interior ", " outward ", " ... below ", " in ... below ", D score, " in ... top ", " on " etc. space relative terms, with the relation facilitating description to describe the element of shown in accompanying drawing or feature and another element (multiple element) or feature (multiple feature).It is directed that space relative terms is intended to contain the device difference except the orientation described in figure in use or operation.Such as, if the device in figure is reversed, then the element being described as be in " below " or " below " of other elements or feature will be oriented at " top " of other elements or feature.Thus, exemplary term " below " can be encompassed in ... top and ... these two orientations of below.Device can otherwise directed (rotated ninety degrees or be in other directed), and the space relative descriptors used in literary composition is interpreted accordingly.

With reference to Fig. 1, provide system 10, this system 10 can comprise low-pressure side compressor 12, high side compressors 14, first heat exchanger 16, expansion gear 18 and the second heat exchanger 20.System 10 can be such as air-conditioning system, refrigeration system or heat pump, and can operate to and make working fluid (such as cold-producing medium, carbon dioxide etc.) circulate heat space as required or cool between the first heat exchanger 16 and the second heat exchanger 20.In the configuration that system 10 can be run as heat pump, reversing valve (not shown) can be set to guide working fluid in heating mode along first direction, flow through system 10 along second direction in refrigeration mode.

Low-pressure side compressor 12 and high side compressors 14 can be communicated with the second heat exchanger 20 fluid with the first heat exchanger 16 and working fluid can be made to circulate through system 10.Low-pressure side compressor 12 and high side compressors 14 can receive the pressure working fluid respectively from the first suction line 22 and the second suction line 24, and respectively pressurized working fluid can be expelled to the first discharge line 26 and the second discharge line 28.Low-pressure side compressor 12 and high side compressors 14 can be arranged in the mode of compression arrangement in parallel (or arranging to be connected in series compressor).

In the operational mode described in FIG, the first heat exchanger 16 can run as condenser or gas cooler, and can remove heat from the pressurized working fluid being received from low-pressure side compressor 12 and high side compressors 14.That is, the first heat exchanger 16 can be connected to main discharge road 30 by fluid, and this main discharge road 30 receives the pressurized working fluid from the first discharge line 26 and the second discharge line 28.

Expansion gear 18 can comprise the expansion gear of any suitable type, as electric expansion valve, heating power expansion valve, step motor valve or capillary.Expansion gear 18 can be arranged between the first heat exchanger 16 and the second heat exchanger 20, and is communicated with the second heat exchanger 20 fluid with the first heat exchanger 16.In described operational mode, expansion gear 18 can make the pressurized working fluid being received from the first heat exchanger 16 expand.In inverted running pattern, expansion gear 18 can make the pressurized working fluid being received from the second heat exchanger 20 expand.

In described operational mode, the second heat exchanger 20 can run as evaporimeter, and this evaporimeter transfers heat to the working fluid flowing through this evaporimeter.Main suction line 32 can receive the low-pressure fluid from the second heat exchanger 20, and described fluid can be transferred to low-pressure side compressor 12 and high side compressors 14 via the first suction line 22 and the second suction line 24 respectively.

Should be understood that, be in the configuration of heat pump in system 10, and reversing valve can be connected to main discharge road 30, main suction line 32, first heat exchanger 16 and the second heat exchanger 20.In an operational mode, main discharge road 30 can be connected with the first heat exchanger 16 fluid by reversing valve, and is connected (as shown in FIG. 1) with the second heat exchanger 20 fluid by main suction line 32.In other operational modes, main discharge road 30 can be connected with the second heat exchanger 20 fluid by reversing valve, and is connected with the first heat exchanger 16 fluid by main suction line 32.

Low-pressure side compressor 12 is depicted as screw compressor in the drawings, but in some embodiments, low-pressure side compressor 12 can be the compressor of other type any, as rotary, reciprocating-piston, screw or centrifugal compressor.Low-pressure side compressor 12 can comprise airtight housing unit 36, clutch shaft bearing assembly and the second bearing assembly 38,39, motor sub-assembly 40, compressing mechanism 42, discharge joint 46 and suction inlet joint 50.Housing unit 36 can form compressor housing, and can comprise cylindrical shell 54 and be located thereon the end cap 56 of end, laterally extending separating part 58 and be positioned at the base portion 60 of its lower end.End cap 56 and separating part 58 can limit discharge chamber 62.Discharge chamber 62 and suction chamber 63 can be separated by separating part 58.Discharge chamber 62 can hold the pressurized working fluid being received from compressing mechanism 42.Suction chamber 63 can hold the pressure working fluid being received from the first suction line 22.

Separating part 58 can comprise extend through this separating part 58 passing away 65 to provide being communicated with between compressing mechanism 42 with discharge chamber 62.Dump valve 48 can allow compressed fluid to flow to discharge chamber 62 from compressing mechanism 42, and can limit or anti-fluid flows to compressing mechanism 42 or suction chamber 63 from discharge chamber 62.Discharge joint 46 can be attached to end cap 56 and the fluid between discharge chamber 62 with the first discharge line 26 can be provided to be communicated with.Suction inlet joint 50 can be attached to housing unit 36 and the first suction line 22 can be provided to be communicated with the fluid between suction chamber 63.

The base portion 60 of housing unit 36 can limit lubricant pool 70 at least in part.First lubricant joint 72 can engage assembly 36, and the fluid between lubricant pool 70 with lubricant conduit 74 can be provided to be communicated with, and lubricant conduit 74 extends between low-pressure side compressor 12 and high side compressors 14.First lubricant joint 72 can be arranged in any suitable position, such as at the predetermined of lubricant pool 70 or normal lubricant level place, above or below it.

Motor sub-assembly 40 can be arranged in suction chamber 63, and can comprise motor stator 82, rotor 84 and power transmission shaft 86.Motor stator 82 can be press-fitted in stator case 87, or is directly press-fitted in housing 54.Rotor 84 can be press-fitted on power transmission shaft 86, and rotary power can be passed to power transmission shaft 86.Power transmission shaft 86 rotatably can be supported by clutch shaft bearing assembly 38 and the second bearing assembly 39.Power transmission shaft 86 can comprise eccentric crank pin 88 and lubricant passageway 90.Lubricant can be passed to each compressor part via lubricant passageway 90 from lubricant pool 70, as crosshead shoe coupling 106, and compressing mechanism 42, clutch shaft bearing assembly 38 and/or the second bearing assembly 39.

Compressing mechanism 42 integrally can be arranged or is arranged at least in part in suction chamber 63, and can comprise dynamic vortex 92 and determine vortex 94.Dynamic vortex 92 can comprise end plate 96, and this end plate 96 has the spiral wrap 98 extended from it.Cylindrical hub 102 can be given prominence to downwards from end plate 96 and can comprise the drive bush 104 be arranged in this cylindrical hub 102.Crank-pin 88 can gearing ground couple drive lining 104.Crosshead shoe coupling 106 with dynamic vortex 92 and can determine the relative rotation that vortex 94 engages to prevent therebetween.

Determine the spiral wrap 110 that vortex 94 can comprise end plate 108 and give prominence to from this end plate 108 downwards.Spiral wrap 110 can engage the spiral wrap 98 of dynamic vortex 92 engagingly, forms the fluid chamber of range of motion thus.In the whole press cycles of compressing mechanism 42, when the fluid chamber limited by spiral wrap 98,110 is mobile from position (being in low pressure) to radial centre position (being in middle pressure) to radially inner side position (being in high pressure), the volume of fluid chamber reduces.End plate 108 can comprise passing away 112, and this passing away 112 is communicated with the fluid chamber being in radially inner side position in fluid chamber and allows compressed working fluid (being in high pressure) to flow in discharge chamber 62.

High side compressors 14 is depicted as screw compressor in the drawings, but in some embodiments, high side compressors 14 can be the compressor of other type any, as rotary, reciprocating-piston, screw or centrifugal compressor.High side compressors 14 can comprise airtight housing unit 136, clutch shaft bearing assembly 138, second bearing assembly 139, motor sub-assembly 140, compressing mechanism 142, discharge joint 146 and suction inlet joint 150.Housing unit 136 can limit high pressure discharge chamber 162, and can comprise cylindrical shell 154, is positioned at the end cap 156 of the upper end of this cylindrical shell 154 and is positioned at the base portion 160 of lower end of this cylindrical shell 154.

Discharge joint 146 and can be attached to end cap 156, and the fluid between discharge chamber 162 with the second discharge line 28 can be provided to be communicated with.Suction inlet joint 150 can be attached to housing unit 136 and the second suction line 24 can be connected with suction lead 153 fluid.Suction lead 153 can extend through discharge chamber 162 a part and provide the second suction line 24 be located on or near compressing mechanism 142 porch check-valves 151 between fluid be communicated with, fluidly isolate from the high-pressure fluid in the low-pressure fluid of the second suction line 24 and discharge chamber 162 simultaneously.

The base portion 160 of housing unit 136 can limit lubricant pool 170 at least in part.Second lubricant joint 172 can engage assembly 136, and the fluid between lubricant pool 170 with lubricant conduit 74 can be provided to be communicated with, and lubricant conduit 74 extends between low-pressure side compressor 12 and high side compressors 14.Second lubricant joint 72,172 can be arranged in and be arranged in, higher or lower than any suitable position of the predetermined oil level in pond 170.As shown in FIG. 1, lubricant conduit 74 can comprise the valve 75 be arranged between the first lubricant joint 72 and the second lubricant joint 172.Lubricant conduit 74 and valve 75 can allow to regulate the amount of the lubricant be contained in respectively in the lubricant pool 70,170 of low-pressure side compressor 12 and high side compressors 14.In some embodiments, valve 75 can be by following control module control electro-mechanical valve (such as, electromagnetic actuating valve), this control module can open and close valve in response to the pressure reduction between the oil level (being determined by liquid level sensor) in oil sump 70,170 and/or oil sump 70,170.In some embodiments, valve 75 can pass through differential pressure actuated.

Motor sub-assembly 140 can integrally be arranged in discharge chamber 162, and can comprise motor stator 182, rotor 184 and power transmission shaft 186.Motor stator 182 can be press-fitted in housing 154.Rotor 184 can be press-fitted on power transmission shaft 186, and rotary power can be passed to power transmission shaft 186.Power transmission shaft 186 rotatably can be supported by clutch shaft bearing assembly 138 and the second bearing assembly 139.Power transmission shaft 186 can comprise eccentric crank pin 188 and lubricant passageway 190.Lubricant can be passed to each compressor part via lubricant passageway 190 from lubricant pool 170, as crosshead shoe coupling 206, and compressing mechanism 142, clutch shaft bearing assembly 138 and/or the second bearing assembly 139.

Compressing mechanism 142 can integrally be arranged in discharge chamber 162, and can comprise dynamic vortex 192 and determine vortex 194.Dynamic vortex 192 can comprise end plate 196, and this end plate 196 has the spiral wrap 198 extended from it.Cylindrical hub 202 can be given prominence to downwards from end plate 196 and can comprise the drive bush 204 be arranged in this cylindrical hub 202.Crank-pin 188 can gearing ground couple drive lining 204.Crosshead shoe coupling 206 with dynamic vortex 192 and can determine the relative rotation that vortex 194 engages to prevent therebetween.

Determine the spiral wrap 210 that vortex 194 can comprise end plate 208 and give prominence to from end plate 208 downwards.Spiral wrap 210 can engage the spiral wrap 98 of dynamic vortex 92 engagingly, forms the fluid chamber of range of motion thus.In the press cycles of compressing mechanism 142, when the fluid chamber limited by spiral wrap 198,210 is mobile from position (being in low pressure) to radial centre position (being in middle pressure) to radially inner side position (being in high pressure), the volume of fluid chamber reduces.End plate 208 can comprise passing away 212, and this passing away 212 is communicated with the fluid chamber being in radially inner side position in fluid chamber and allows compressed working fluid (being in high pressure) to flow in discharge chamber 162.Dump valve 148 can provide the selective fluid between passing away 212 with discharge chamber 162 to be communicated with.

Should be understood that, low-pressure side compressor 12 includes the capacity adjusting mechanism of some forms with the one or both in high side compressors 14, as mechanical adjustment and/or steam spray, to change low-pressure side compressor 12 and the output of one or both in high side compressors 14.In some embodiments, system 10 can comprise more than one low-pressure side compressor 12 and/or more than one high side compressors 14.One or more compressor 12,14 can have and one or more other compressor 12,14 different capacity.One or more compressor 12,14 can comprise constant speed motor or variable speed driver.

As shown in FIG. 2, main suction line 32 and the first suction line 22 can form stream that is roughly straight and/or that roughly do not stopped.Unlike this, the second suction line 24 can be angled relative to main suction line 32, makes the fluid flowed into from main suction line 32 will carry out the turning larger than 90 degree, to enter the second suction line 24.In this way, when mixture that is liquid and gaseous working fluid flows towards low-pressure side compressor 12 and high side compressors 14 through main suction line 32, whole or most liquid working stream cognition walks around the second suction line 24, and directly flow to the first suction line 22, and gaseous working stream cognition flows in the second suction line 24.This is because gaseous working fluid will have the inertia higher than gaseous working fluid, which prevent the ability that turning that gaseous working fluid carries out being greater than 90 degree enters the second suction line 24.Lighter gaseous working fluid can not be subject to this so large impact being greater than the turning of 90 degree as gaseous working fluid.In this way, gaseous working fluid can be supplied to suction attachment 150 and the suction lead 153 of high side compressors 14, and more gaseous working fluid can be supplied to suction attachment 50 and the suction chamber 63 of low-pressure side compressor 12 simultaneously.Therefore, receive to the gaseous working fluid in the suction chamber 63 of low-pressure side compressor 12 and can cool the motor sub-assembly 40 of low-pressure side compressor 12 and/or miscellaneous part before being sucked in compressing mechanism 42.Reception may evaporate (becoming gaseous working fluid mutually) to the gaseous working fluid of some or all in suction chamber 63 before entering compressing mechanism 42, when it cools motor sub-assembly 40.The structure of main suction line 32, first suction line 22 described above and the second suction line 24 can reduce or prevent gaseous working fluid from entering in high side compressors 14, and this can reduce or prevent gaseous working fluid from being washed away by the moving parts of lubricant from compressing mechanism 142.

Should be appreciated that in some embodiments, the angle between main suction line 32 and the second suction line 24 can be more greater or lesser than the angle shown in Fig. 2.Such as, in some embodiments, this angle can be about 90 degree or be less than 90 degree.

As shown in FIG. 1, the second aspiration 24 can comprise the check-valves 34 be arranged between main suction line 32 and the suction attachment 150 of high side compressors 14.Check-valves 34 can allow fluid to flow towards suction attachment 150, and restriction or anti-fluid flow to main suction line 32 or the first suction line 22 from suction attachment 150.In some embodiments, the second suction line 24 can not comprise check-valves 34.

With reference to Fig. 3, provide another system 310, this system 310 can comprise low-pressure side compressor 312, high side compressors 314, first heat exchanger 316, expansion gear 318, and the second heat exchanger 320.Except following any exception that is that point out and/or that illustrate in the drawings, low-pressure side compressor 312 and high side compressors 314 can be arranged in the mode of compression arrangement in parallel.Compressor 312,314, the 26S Proteasome Structure and Function of heat exchanger 316,320 and expansion gear 318 can roughly be similar to compressor described above 12,14, the 26S Proteasome Structure and Function of heat exchanger 16,20 and expansion gear 18.Therefore, can not be described in detail similar feature again.

Be similar to system 10, system 310 can comprise main discharge road 330 and main suction line 332.The main suction line 332 of system 310 can be connected to the first suction attachment 334 and the second suction attachment 336 of low-pressure side compressor 312 by fluid.In some embodiments, both the first suction attachment 334 and the second suction attachment 336 all can provide low pressure (suction pressure) working fluid to the suction chamber 363 of low-pressure side compressor 312.In some embodiments, the first suction attachment 334 and the second suction attachment 336 can be combined to form single joint.In some embodiments, first suction attachment 334 can connect with suction lead (not shown), suction lead is connected directly to the entrance of the compressing mechanism 342 of low-pressure side compressor 312, this suction lead makes some or all fluids in it and suction chamber 363, and roughly fluid isolation is (such as, be similar to the U.S. Provisional Application No.61/761 owned together assignee, configuration disclosed in 378, the disclosure of this provisional application is merged into herein by reference at this).

Low-pressure side compressor 312 can comprise discharges joint 346 and outlet connection 347.Be similar to and discharge joint 46, discharging joint 346 can be communicated with discharge chamber 362 fluid, and can receive the compressed working fluid of discharging from compressing mechanism 342.A part for suction pressure working fluid in suction chamber 363 can leave low-pressure side compressor 312 via outlet connection 347.Discharge chamber 362 can be separated by separating part 358 with suction chamber 363.

High side compressors 314 can comprise suction attachment 450, first and discharge joint 446 and the second discharge joint 447 and entrance 449.The swabbing pressure working fluid of the outlet 347 from low-pressure side compressor 312 can be received via suction attachment 450.Suction attachment 450 can be attached to the compressing mechanism 442 of high side compressors 314 via suction lead 453.Similar with suction lead 153, suction lead 453 can make the suction pressure working fluid in it keep and the discharge pressure working fluid roughly fluid isolation in discharge chamber 462.

First discharges joint 446 can be communicated with discharge chamber 462 fluid of high side compressors 314 with the second discharge joint 447 and entrance 449.By entrance 449, the discharge pressure working fluid of the discharge joint 346 from low-pressure side compressor 312 can be received in the discharge chamber 462 of high side compressors 314.Discharge pressure working fluid can be discharged joint 446 and second by first and be discharged the discharge chamber 462 that joint 447 leaves high side compressors 314, and flows in main discharge road 330.In some embodiments, the first discharge joint 446 and the second discharge joint 447 can be combined to be formed the single discharge joint applying the fluid to main discharge road 330.

Lubricant conduit 374 can be communicated with the lubricant pool fluid of high side compressors 314 with low-pressure side compressor 312.Valve 375 can control flowing through lubricant conduit 374 to regulate low-pressure side compressor 312 and the lubricant level in the lubricant pool of high side compressors 314.

Continue with reference to Fig. 3, will the operation of system 310 be described in detail.Suction pressure working fluid from the second heat exchanger 320 can flow in main suction line 332.Suction pressure working fluid can be flowed into the suction chamber 363 of low-pressure side compressor 312 from main suction line 332 by the first suction attachment 334 and the second suction attachment 336.The Part I of the working fluid in suction chamber 363 can be sucked in compressing mechanism 342 and to compress in compressing mechanism 342.These working fluids can be expelled to discharge chamber 362 from compressing mechanism 342.Discharge pressure working fluid can leave low-pressure side compressor 312 from discharge chamber 362 via discharge joint 346, and flows in the discharge chamber 462 of high side compressors 314 via entrance 449.In this way, at high side compressors 314 run duration and/or when not running (that is, shutting down) in high side compressors 314, the discharge chamber 462 of high side compressors 314 can be used as oily accumulator and/or the silencer of low-pressure side compressor 312.When high side compressors 314 is not run and low-pressure side compressor 312 runs, at least one the check-valves (not shown) between the outlet being arranged in the outlet 347 of low-pressure side compressor 312 and the compressing mechanism 442 of high side compressors 314 can limit or prevent the reverse flow through system 310.Such as, this check-valves can be positioned at inside or the outside of high side compressors 314, and can be similar to the dump valve 148 of the high side compressors 14 in Fig. 1.

The Part II of the working fluid in suction chamber 363 can leave low-pressure side compressor 312 via outlet 347, and can flow in suction attachment 450 to compress in the compressing mechanism 442 of high side compressors 314 subsequently.Therefore; low-pressure side compressor 312 run duration and/or do not run (when shutting down when low-pressure side compressor 312 at low-pressure side compressor 312; most of or whole workflow cognition enters in suction chamber 363 via the second entrance 336) time, the suction chamber 363 of low-pressure side compressor 312 can be used as the suction line liquid reservoir of high side compressors 314.Working fluid is compressed in the compressing mechanism 442 of high side compressors 314, and is expelled to discharge chamber 462 from compressing mechanism 442.Discharge pressure working fluid leaves high side compressors 314 from discharge chamber 462 via the first one or both of discharging joint 446 and the second discharge joint 447, and can flow in main discharge road 330.As previously discussed, working fluid can flow to the first heat exchanger 316 from main discharge road 330, then flows to expansion gear 318, and is back to the second heat exchanger 320.

With reference to Fig. 4, provide another system 510, this system 510 can comprise low-pressure side compressor 512, high side compressors 514, first heat exchanger 516, expansion gear 518 and the second heat exchanger 520.Except following any exception that is that point out and/or that illustrate in the drawings, compressor 512,514, the 26S Proteasome Structure and Function of heat exchanger 516,520 and expansion gear 518 be roughly similar to compressor described above 12,14, the 26S Proteasome Structure and Function of heat exchanger 16,20 and expansion gear 18.Therefore, can not be described in detail similar feature again.

System 510 can be run in a first pattern, in this first mode, (namely high side compressors 514, low-pressure side compressor 512 run as first order compressor and high stage compressor, series connection compression arrangement, wherein, low-pressure side compressor 512 can to being compressed further by the working fluid that high side compressors 514 is compressed).System 510 also can be run in a second mode, and in this second pattern, high side compressors 514 can be shut down or be stopped using, and in this case, working fluid can walk around high side compressors 514, and this will describe in more detail following.

High side compressors 514 can comprise the compressing mechanism 642 be arranged in discharge chamber 662 and the suction lead 653 connected with compressing mechanism 642 by suction attachment 650.Compressing mechanism 642 can compress the working fluid received from suction lead 653, and is expelled in discharge chamber 662 by compressed working fluid.Compressed working fluid can leave high side compressors 514 from discharge chamber 662 via discharge joint 646.

Low-pressure side compressor 512 can comprise compressing mechanism 542, and this compressing mechanism 542 can integrally or at least in part be arranged in suction chamber 563.Compressing mechanism 542 can suck working fluid from suction chamber 563, compresses described working fluid, and is expelled in discharge chamber 562 by described working fluid.Suction chamber 563 and discharge chamber 562 can be separated by separating part 558.Working fluid can leave low-pressure side compressor 512 from discharge chamber 562 via discharge joint 546.Lubricant conduit 574 can be arranged between the first lubricant joint 572 and the second lubricant joint 672, and the fluid between low-pressure side compressor 512 and the respective oil sump 570,670 of high side compressors 514 can be provided to be communicated with.First lubricant joint 572, second lubricant joint 672 can be arranged in and be in, higher or lower than the predetermined lubricant level place in pond 570,670.

System 510 can comprise main suction line 532, main discharge road 530, suck bypass conduit 531 and inter-stage pipeline 533.Main suction line 532 can be communicated with suction attachment 650 fluid of high side compressors 514 with suction bypass conduit 531.Suck bypass conduit 531 can comprise fluid and be connected to the second end 502 that the first end 501 of main suction line 532 and fluid are connected to inter-stage pipeline 533.Check-valves 503 can be arranged between first end 501 and the second end 502, and can fluid be allowed to flow to the second end 502 from first end 501 by the fluid pressure in first end 501 when being greater than in the second end 502 fluid pressure (such as stop using in high side compressors 514, and when low-pressure side compressor 512 runs).Check-valves 503 can limit or anti-fluid flows to first end 501 from the second end 502.The discharge joint 646 of high side compressors 514 can be connected with suction attachment 550 fluid of low-pressure side compressor 512 by inter-stage pipeline 533.Main discharge road 530 can receive the working fluid of the discharge joint 546 from low-pressure side compressor 512.

Continue with reference to Fig. 4, will the operation of system 510 be described in detail.As described above; system 510 can be run in a first mode and a second mode; in this first mode; both compressors 512,514 all run; and low-pressure side compressor 512 is to being compressed further by the working fluid that high side compressors 514 is compressed; in this second pattern, high side compressors 514 is shut down and low-pressure side compressor 512 runs.

When system 510 is run in a first pattern, the workflow cognition being in the first lower pressure flows into the suction attachment 650 of high side compressors 514 from main suction line 532.Working fluid is sucked into compressing mechanism 642 from suction attachment 650, and is compressed into second pressure higher than the first pressure.The working fluid being in the second pressure can be discharged in discharge chamber 662, then flows out into inter-stage pipeline 533 via discharge joint 646 from high side compressors 514.The working fluid being in the second pressure can flow into the suction chamber 563 of low-pressure side compressor 512 from inter-stage pipeline 533 via suction attachment 550.The working fluid being in the second pressure can be sucked into the compressing mechanism 542 of low-pressure side compressor 512 from suction chamber 563, and is further compressed to three pressure higher than the second pressure.The working fluid being in the 3rd pressure can be expelled to discharge chamber 562 by from compressing mechanism 542, then flows out into main discharge road 530 via discharge joint 546 from low-pressure side compressor 512.

In a first mode, the fluid pressure in the discharge chamber 662 of high side compressors 514 can be substantially equal to the fluid pressure in the suction chamber 563 of low-pressure side compressor 512.Therefore, the pressure of the both sides of lubricant conduit 574 can be roughly equal.This pressure is equal facilitates the equal of high side compressors 514 and the oil level in the lubricant pool 670,570 of low-pressure side compressor 512.

When system 510 is run in a second mode, the working fluid being in the first pressure can flow into the first end 501 sucking bypass conduit 531 from main suction line 532.Because high side compressors 514 can be inactive in a second mode, and low-pressure side compressor 512 can be run in a second mode, therefore come autonomous suction line 532 working fluid can by compressing mechanism 542 through suction bypass conduit 531 aspirate, and therefore only minute quantity or do not have workflow know from experience enter suction attachment 650.The first end 501 that the workflow being in the first pressure is known from experience from sucking bypass conduit 531 flows through check-valves 503 and flows into inter-stage pipeline 533, and flows in the suction chamber 563 of low-pressure side compressor 512 via suction attachment 550 subsequently.Working fluid can be sucked into compressing mechanism 542 from suction chamber 563 and be compressed to the pressure high and lower than the 3rd pressure than the first pressure from the first pressure in compressing mechanism 542.Working fluid can be discharged to discharge chamber 562 from compressing mechanism 542, and can flow out from low-pressure side compressor 512 via discharge joint 546, flows into main discharge road 530.

With reference to Fig. 5, provide another system 710, this system 710 can comprise low-pressure side compressor 712, high side compressors 714, first heat exchanger 716, expansion gear 718, and the second heat exchanger 720.Except following any exception that is that point out and/or that illustrate in the drawings, compressor 712,714, the 26S Proteasome Structure and Function of heat exchanger 716,720 and expansion gear 718 can roughly be similar to compressor described above 12,14, the 26S Proteasome Structure and Function of heat exchanger 16,20 and expansion gear 18.Therefore, can not be described in detail similar feature again.

System 710 can be run in a first pattern, in this first mode, low-pressure side compressor 712, high side compressors 714 run (that is, high side compressors 714 can to being compressed further by the working fluid that low-pressure side compressor 712 is compressed) as first order compressor and high stage compressor.System 710 also can be run in a second mode, and in this second pattern, low-pressure side compressor 712 can be shut down or be stopped using, and in this case, working fluid can walk around low-pressure side compressor 712, and this will describe in more detail following.

High side compressors 714 can comprise the compressing mechanism 842 be arranged in discharge chamber 862 and the suction lead 853 connected with compressing mechanism 842 by suction attachment 850.Compressing mechanism 842 can compress the working fluid received from suction lead 853, and is expelled in discharge chamber 862 by compressed working fluid.Compressed working fluid can leave high side compressors 714 from discharge chamber 862 via discharge joint 846.

Low-pressure side compressor 712 can comprise compressing mechanism 742, and this compressing mechanism 742 can integrally or at least in part be arranged in suction chamber 763.Compressing mechanism 742 can suck working fluid from suction chamber 763, compresses described working fluid, and is expelled in discharge chamber 762 by described working fluid.Suction chamber 763 and discharge chamber 762 can be separated by separating part 758.Working fluid can leave low-pressure side compressor 712 from discharge chamber 762 via discharge joint 746.Lubricant conduit 774 can provide the fluid between low-pressure side compressor 712 and the respective oil sump 770,870 of high side compressors 714 to be communicated with.

System 710 can comprise main suction line 732, main discharge road 730, suck bypass conduit 731 and inter-stage pipeline 733.Main suction line 732 can be communicated with suction attachment 750 fluid of low-pressure side compressor 712 with suction bypass conduit 731.Suck bypass conduit 731 can comprise fluid and be connected to the second end 702 that the first end 701 of main suction line 732 and fluid are connected to inter-stage pipeline 733.Check-valves 703 can be arranged between first end 701 and the second end 702, and can fluid be allowed to flow to the second end 702 from first end 701 by the fluid pressure in first end 701 when being greater than in the second end 702 fluid pressure (such as stop using at low-pressure side compressor 712, and when high side compressors 714 is run).Check-valves 703 can limit or anti-fluid flows to first end 701 from the second end 702.The discharge joint 746 of low-pressure side compressor 712 can be connected with suction attachment 850 fluid of high side compressors 714 by inter-stage pipeline 733.Main discharge road 730 can receive the working fluid of the discharge joint 846 from high side compressors 714.

Continue with reference to Fig. 5, will the operation of system 710 be described in detail.As described above; system 710 can be run in a first mode and a second mode; in this first mode; both compressors 712,714 all run and high side compressors 714 to being compressed further by the working fluid that low-pressure side compressor 712 is compressed; in this second pattern, low-pressure side compressor 712 is shut down and high side compressors 714 is run.

When system 710 is run in a first pattern, the workflow cognition being in the first lower pressure flows into the suction attachment 750 of low-pressure side compressor 712 from main suction line 732.Working fluid flows into suction chamber 763 from suction attachment 750, and is sucked in compressing mechanism 742, and is compressed into second pressure higher than the first pressure.The working fluid being in the second pressure can be discharged in discharge chamber 762, then flows out into inter-stage pipeline 733 via discharge joint 746 from low-pressure side compressor 712.The working fluid being in the second pressure can flow into high side compressors 714 from inter-stage pipeline 733 via suction attachment 850.The working fluid being in the second pressure can be sucked into the compressing mechanism 842 of high side compressors 714 from suction attachment 850 via suction lead 853, and is further compressed to three pressure higher than the second pressure.The working fluid being in the 3rd pressure can be expelled to discharge chamber 862 from compressing mechanism 842, then flows out high side compressors 714 via discharge joint 846 and goes forward side by side and become owner of discharge line 730.

In a first mode, the fluid pressure in the discharge chamber 862 of high side compressors 714 can higher than the fluid pressure in the suction chamber 763 of low-pressure side compressor 712.Therefore, the pressure reduction of lubricant conduit 774 both sides can impel lubricant to flow from the lubricant pool 870 of high side compressors 714 to the lubricant pool 770 of low-pressure side compressor 712.Therefore, the lubricant being sent to high side compressors 714 via inter-stage pipeline 733 from low-pressure side compressor 712 together with the working fluid of discharging can be back to low-pressure side compressor 712 via lubricant conduit 774.In some embodiments, control valve 775 can be communicated with the liquid level sensor (not shown) in high side compressors 714 with low-pressure side compressor 712, and can control to flow to maintain low-pressure side compressor 712 and the roughly equal oil level in high side compressors 714 or predetermined oil level through the fluid of lubricant conduit 774.

When system 710 is run in a second mode, the working fluid being in the first pressure can flow into the first end 701 sucking bypass conduit 731 from main suction line 732.The first end 701 that the workflow being in the first pressure is known from experience from sucking bypass conduit 731 flows through check-valves 703 and flows into inter-stage pipeline 733, and flows into subsequently in the suction attachment 850 of high side compressors 714.Working fluid can be sucked into compressing mechanism 842 from suction attachment 850 and be compressed to the pressure high and lower than the 3rd pressure than the first pressure by from the first pressure in compressing mechanism 842.Working fluid can be discharged to discharge chamber 862 from compressing mechanism 842, and can flow out from high side compressors 714 via discharge joint 846, flows into main discharge road 730.

With reference to Fig. 6, provide another system 910, this system 910 can comprise compressor 912, first heat exchanger 916, expansion gear 918, and the second heat exchanger 920, discharge line 930 and suction line 932.Except following any exception that is that point out and/or that illustrate in the drawings, the 26S Proteasome Structure and Function of heat exchanger 916,920 and expansion gear 918 can roughly be similar to heat exchanger described above 16,20, expansion gear 18, discharge line 30 and suction line 32 26S Proteasome Structure and Function.Therefore, can not be described in detail similar feature again.

Compressor 912 can comprise airtight housing unit 936, clutch shaft bearing assembly 938, second bearing assembly 939, motor sub-assembly 940, first compressing mechanism 942, second compressing mechanism 944, discharge joint 946 and suction inlet joint 950.Housing unit 936 can form compressor housing, and can comprise cylindrical shell 954, first end 956, laterally extending separating part 958 and the second end 960.Housing 954 can limit lubricant pool 970.First end 956, housing 954 and separating part 958 can limit the first Room 961.Second end 960 and separating part 958 can limit the second Room 962.Second Room 962 and the first Room 961 can separate by separating part 958.First Room 961 can hold the compressed working fluid received from the first compressing mechanism 942.Second Room 962 can hold the working fluid through compression further received from the second compressing mechanism 944.

Motor sub-assembly 940 to can be received in housing unit 936 and can comprise stator 982, rotor 984 and be fixed to the power transmission shaft 986 of rotor 984.Power transmission shaft 986 rotatably can be supported by clutch shaft bearing assembly 938 and the second bearing assembly 939, and can drive both the first compressing mechanism 942 and the second compressing mechanism 944.Each end of power transmission shaft 986 all can comprise crank-pin 988, and described crank-pin 988 engages the first compressing mechanism 942 and the corresponding one in the second compressing mechanism 944 gearingly.

First compressing mechanism 942 roughly can be similar to compressing mechanism 142 described above, and can comprise dynamic vortex 1092 and determine vortex 1094.Determine vortex 1094 and can comprise the suction inlet 1051 being attached to suction attachment 950 by suction lead 953.As described above, the working fluid flowing through suction attachment 950 and suction lead 953 roughly fluidly can be isolated with the first Room 961.Determine vortex 1094 and can comprise the passing away 1012 be communicated with the first Room 961.

Second compressing mechanism 944 roughly can be similar to compressing mechanism 42 described above, and can comprise dynamic vortex 992 and determine vortex 994.Determine vortex 994 and can comprise passing away 996.Working fluid can be discharged via passing away 996 from the second compressing mechanism 944 and can flow into via the opening 998 separating part 958 in second Room 962.

Continue, with reference to Fig. 6, the operation of compressor 912 will to be described in more detail.The working fluid being in the first lower pressure can flow to suction attachment 950 from suction line 932.Working fluid can flow through suction lead 953 from suction attachment 950 and flow into the first compressing mechanism 942.Working fluid can be compressed to second pressure higher than the first pressure by the first compressing mechanism 942, and is expelled to by working fluid in the first Room 961.

The working fluid being in the second pressure in the first Room 961 can be sucked in the second compressing mechanism 944, and can be compressed into three pressure higher than the second pressure in the second compressing mechanism 944.The working fluid being in the 3rd pressure can be expelled to the second Room 962 from the second compressing mechanism 944, and can leave compressor 912 via discharge joint 946.

Any one that should be appreciated that in system 10,310,510,710,910 can be reversible heat pump system.One or both being to be understood that in the compressor of system 10,310,510,710,910 and/or compressing mechanism can be conditioned, can comprise that such as steam sprays, variable speed driver and/or inter-stage steam spray, and/or for changing the additional of its capacity or substituting parts or feature.Some have band variable speed driver compressor configuration in, inverter can in both low-pressure side compressor and high side compressors or low-pressure side compressor and high side compressors only one power is provided.Additionally or alternatively, in the system 10,310,510,810 provided, low-pressure side compressor 12,312,512,712 and high side compressors 14,314,514,714 can have capacity different from each other or discharge capacity.Similarly, in system 910, compressing mechanism 942,944 can have capacity different from each other or discharge capacity.In some configurations of system described above, an only compressor in the compressor of system runs during refrigeration mode, and (namely only another compressor in described compressor runs during heating mode, a compressor in described compressor is exclusively used in and runs in a chiller mode, and another compressor is exclusively used in and runs with heating mode).

As shown in Figure 7, in some configurations, system 10,310,510,710 can comprise control module 800, when system 10,310,510,710 is run with heating mode, this control module 800 can make the one in low-pressure side compressor 12,312,512,712 and high side compressors 14,314,514,714 run, and stops the another one in low-pressure side compressor 12,312,512,712 and high side compressors 14,314,514,714 to be run.In some embodiments, control module 800 can be operating as and when system 10,310,510,710 is run in a chiller mode, the described another one in described low-pressure side compressor 12,312,512,712 and described high side compressors 14,314,514,714 be run, and stops the described one in described low-pressure side compressor 12,312,512,712 and described high side compressors 14,314,514,714 to be run.Although do not illustrate particularly in Fig. 7, system 10,310,510,710 can comprise bypass manifold and control valve and get around off-duty one in low-pressure side compressor 12,312,512,712 and high side compressors 14,314,514,714 to guide working fluid.In addition, switching device shifter (such as, cross valve can be set; Not shown), with depend on system 10,310,510,710 in a chiller mode, heating mode or defrosting mode run and alter flows through the direction of system 10,310,510,710.

As shown in FIG. 7, in some configurations, system 10,310,510,710 can comprise outdoor unit 802 and indoor unit 806, and this outdoor unit 802 comprises the one in outdoor heat converter 804 and low-pressure side compressor 12,312,512,712 and high side compressors 14,314,514,714; This indoor unit 806 comprises the another one in indoor heat converter 808 and low-pressure side compressor 12,312,512,712 and high side compressors 14,314,514,714.

With reference to Fig. 8, provide heat pump 1110, this heat pump 1110 can comprise high side compressors 1112, low-pressure side compressor 1114, outdoor heat converter 1116, first expansion gear 1124, first check-valves 1122, second check-valves 1120, second expansion gear 1118, indoor heat converter 1126, high pressure side conduit 1128 and low-pressure side bypass manifold 1130.High pressure side conduit 1128 can comprise the first control valve 1132, and this first control valve 1132 optionally limits and allows fluid to flow through this first control valve 1132.Low-pressure side bypass manifold 1130 can comprise the second control valve 1134, and this second control valve 1134 optionally limits and allows fluid to flow through this second control valve 1134.High side compressors 1112 can comprise suction inlet 1136 and discharge outlet 1138.Low-pressure side compressor 1114 can comprise suction inlet 1140 and discharge outlet 1142.Suction lead 1144 can extend between the suction inlet 1136 of high side compressors 1112 and the suction inlet 1140 of low-pressure side compressor 1114.

Heat pump 1110 can run with heating mode and in a chiller mode.When heat pump 1110 runs in a chiller mode; high side compressors 1112 can be shut down, opens the first control valve 1132, be closed the second control valve 1134 by control module 1146, and makes low-pressure side compressor 1114 run to make working fluid cycles pass heat pump 1110.In this way, at heat pump 1110 run duration in a chiller mode, low-pressure side compressor 1114 can compress the working fluid be sucked in low-pressure side compressor 1114 from suction lead 1144, and is discharged via discharge outlet 1142 by compressed working fluid.Working fluid can flow over outdoor heat converter 1116 from discharge outlet 1142, and the heat herein from working fluid is discharged.Working fluid can flow through the first check-valves 1122 and the first expansion gear 1124 by heat exchanger 1116 outdoor.Working fluid can flow to indoor heat converter 1126 from the first expansion gear 1124, and herein, working fluid Absorbable rod is from the warm of room air or other fluids.Working fluid can flow in high pressure side conduit 1128 by heat exchanger 1126 indoor, through the first control valve 1132, and is back in suction lead 1144.

When heat pump 1110 runs with heating mode; control module 1146 can make low-pressure side compressor 1144 shut down; close the first control valve 1132, open the second control valve 1134, and make high side compressors 1112 run to make working fluid cycles pass heat pump 1110.In this way, at heat pump 1110 with heating mode run duration, high side compressors 1112 can to compressing from suction lead 1144 working fluid be sucked in high side compressors 1112 and being discharged via discharge outlet 1138 by compressed working fluid.Working fluid can flow through indoor heat converter 1126 from discharge outlet 1138, and the heat herein from working fluid can be discharged.Working fluid can flow through the second check-valves 1120 and the second expansion gear 1118 by heat exchanger 1126 indoor.Working fluid can flow to outdoor heat converter 1116 from the second expansion gear 1118, and herein, working fluid Absorbable rod is from the warm on ambient outdoor air, another fluid or another heat sink (such as, ground).Working fluid can flow in low-pressure side bypass manifold 1130 by heat exchanger 1116 outdoor, through the second control valve 1134, and is back in suction lead 1144.

In some embodiments, low-pressure side compressor 1114 can run as suction accumulator during heating mode, and high side compressors 1112 can be run as suction accumulator during refrigeration mode.In this embodiment, heat pump 1110 can comprise and accumulates conduit 1150 and second with first of the internal fluid communication of high side compressors 1112 and low-pressure side compressor 1114 respectively and accumulate conduit 1152.First accumulation conduit 1150 and the second accumulation conduit 1152 can comprise respectively to be accumulated control valve 1154 and second with first of control module 1146 electrical communication and accumulates control valve 1156.When heat pump 1110 runs with heating mode, control module 1146 can be closed the first accumulation control valve 1154 and be opened the second accumulation control valve 1156.Along with the second accumulation control valve 1156 is opened, suction pressure working fluid from outdoor heat converter 1116 is allowed to enter the suction chamber of low-pressure side compressor 1114 (such as, suction chamber 63 as described above), make it possible to the working fluid accumulating desired amount within it.When heat pump 1110 runs in a chiller mode, control module 1146 can be closed the second accumulation control valve 1156 and be opened the first accumulation control valve 1154.Along with opening of the first accumulation control valve 1154, suction pressure working fluid from suction lead 1144 is allowed to enter the room of high side compressors 1112 (such as, room 162 as described above), make it possible to the working fluid accumulating desired amount within it.

In some embodiments, lubricant communication conduit 1160 can provide the fluid between high side compressors 1112 and the lubricant pool (not shown) of low-pressure side compressor 1114 to be communicated with.Control valve 1162 can be arranged along lubricant communication conduit 1160.Control module 1146 can open and close control valve 1162 optionally to allow and to limit lubricant being communicated with (such as, based on the information from the liquid level sensor (not shown) in low-pressure side compressor 1114) between high side compressors 1112 with low-pressure side compressor 1114.

With reference to Fig. 9, provide another heat pump 1210, this heat pump 1210 can comprise high side compressors 1212, low-pressure side compressor 1214, outdoor heat converter 1216, first expansion gear 1224, first check-valves 1222, second check-valves 1220, second expansion gear 1218, indoor heat converter 1226, high pressure side conduit 1228 and low-pressure side bypass manifold 1230.High pressure side conduit 1228 can comprise the first control valve 1232, and this first control valve 1232 optionally limits and allows fluid to flow through this first control valve 1232.Low-pressure side bypass manifold 1230 can comprise the second control valve 1234, and this second control valve 1234 optionally limits and allows fluid to flow through this second control valve 1234.High side compressors 1212 can comprise suction inlet 1236 and discharge outlet 1238.Low-pressure side compressor 1214 can comprise suction inlet 1240 and discharge outlet 1242.Suction lead 1244 can extend between the suction inlet 1236 of high side compressors 1212 and the suction inlet 1240 of low-pressure side compressor 1214.Discharge conduit 1246 to extend between the discharge outlet 1238 of high side compressors 1212 and the discharge of low-pressure side compressor 1214 export 1242.

The discharge outlet 1238 of discharge conduit 1246, high side compressors 1212 and the conduit 1250 extended between indoor heat converter 1226 and high side compressors 1212 can be interconnected by the first triple valve 1248.First triple valve 1248 can move between the first location and the second location.In primary importance, the first triple valve 1248 allow fluid high side compressors 1212 discharge outlet 1238 be communicated with between discharge conduit 1246 and prevent conduit 1250 and discharge conduit 1246 and discharge both outlets 1238 fluid and be communicated with.In the second position, the first triple valve 1248 allows fluid flow to conduit 1250 from the discharge outlet 1238 of high side compressors 1212 and allow fluid to flow to conduit 1250 from discharge conduit 1246.In some embodiments, the first triple valve 1248 can move to the 3rd position, in the 3rd position, discharges outlet 1238, discharge conduit 1246 and conduit 1250 and is all prevented from communicating with each other.

Second triple valve 1252 can be arranged in and discharge conduit 1246, the discharge of low-pressure side compressor 1214 exports between 1242 and the conduit 1254 extended between outdoor heat converter 1216 and low-pressure side compressor 1214.Second triple valve 1252 can move between the first location and the second location.In primary importance, the second triple valve 1252 allows the discharge of low-pressure side compressor 1214 to export fluid between 1242 with discharge conduit 1246 to be communicated with, and prevents conduit 1254 and discharge conduit 1246 and discharge both outlets 1242 fluid and be communicated with.In the second position, the second triple valve 1252 allows fluid to flow to conduit 1254 from the discharge outlet 1242 of low-pressure side compressor 1214, and allows fluid to flow to conduit 1254 from discharge conduit 1246.In some embodiments, the second triple valve 1252 can move to the 3rd position, in the 3rd position, discharges outlet 1242, discharge conduit 1246 and conduit 1254 and is all prevented from communicating with each other.

Heat pump 1210 can with the first heating mode (wherein; high side compressors 1212 is run; low-pressure side compressor 1214 is shut down), the second heating mode (wherein; high side compressors 1212 and low-pressure side compressor 1214 all run), the first refrigeration mode (wherein; low-pressure side compressor 1214 runs; high side compressors 1212 is shut down) and the second refrigeration mode (wherein, high side compressors 1212 and low-pressure side compressor 1214 all run) run.In order to make heat pump 1210 run with the first heating mode, control module 1256 can make low-pressure side compressor 1214 shut down, the second triple valve 1252 is moved to the 3rd position, open the second control valve 1234, closes the first control valve 1232, the first triple valve 1248 moved to the second place and high side compressors 1212 is run.In the first heating mode, high side compressors 1212 can be compressed the working fluid being sucked into high side compressors 1212 from suction lead 1244, and is discharged via discharge outlet 1238 by compressed working fluid.Working fluid can flow through conduit 1250 from discharge outlet 1238 and flow into indoor heat converter 1226, and herein, the heat from working fluid can be discharged.Working fluid can flow through the second expansion gear 1218 and the second check-valves 1220 by heat exchanger 1226 indoor.Working fluid can flow to outdoor heat converter 1216 from the second expansion gear 1218, and herein, working fluid Absorbable rod is from the warm on ambient outdoor air, another fluid or another heat sink (such as ground).Working fluid can flow in low-pressure side bypass manifold 1230 by heat exchanger 1216 outdoor, through the second control valve 1234, and is back in suction lead 1244.

Except following, heat pump 1210 can be roughly the same with the operation of the first heating mode with the operation of the second heating mode: in the second heating mode, control module 1256 makes the second triple valve 1252 move to primary importance, and low-pressure side compressor 1214 is run.In this way, a part from the working fluid of suction lead 1244 is also sucked in low-pressure side compressor 1214, and compressed working fluid is discharged from low-pressure side compressor 1214 and flowed to conduit 1250 also subsequently to indoor heat converter 1226 via discharge conduit 1246.

When running with the first refrigeration mode to make heat pump 1210; high side compressors 1212 can be shut down by control module 1256; the first triple valve 1248 is made to move to the 3rd position; open the first control valve 1232, close the second control valve 1234, make the second triple valve 1252 move to the second place, and low-pressure side compressor 1214 is operated.In the first refrigeration mode, low-pressure side compressor 1214 can compress the working fluid be sucked in low-pressure side compressor 1214 from suction lead 1244, and is discharged via discharge outlet 1242 by compressed working fluid.Working fluid can flow through conduit 1254 from discharge outlet 1242 and enter to outdoor heat converter 1216, and herein, the heat from working fluid can be discharged.Working fluid can flow through the first expansion gear 1224 and the first check-valves 1222 by heat exchanger 1216 outdoor.Working fluid can flow into indoor heat converter 1226 from the first expansion gear 1224, and herein, working fluid can absorb the heat from room air or another fluid.Working fluid can flow in high pressure side conduit 1228 by heat exchanger 1226 indoor, flows back in suction lead 1244 through the first control valve 1232.

Except following, heat pump 1210 can be roughly the same with the operation of the first refrigeration mode with the operation of the second refrigeration mode: in the second refrigeration mode, control module 1256 makes the first triple valve 1248 move to primary importance, and high side compressors 1212 is run.In this way, a part from the working fluid of suction lead 1244 is also sucked in high side compressors 1212, and compressed working fluid is discharged from high side compressors 1212 and flowed through discharge conduit 1246 to conduit 1254 also subsequently to outdoor heat converter 1216.

Should be appreciated that the first triple valve 1248 and the second triple valve 1252 can substitute with three two-way valve (not shown).That is, first two-way valve in described two-way valve can be arranged between high-pressure side by-pass conduit 1228 and discharge conduit 1246 along conduit 1250.Second two-way valve in described two-way valve can be arranged along discharge conduit 1246.The 3rd two-way valve in described two-way valve can be arranged between discharge conduit 1246 and low-pressure side by-passing valve 1230 along conduit 1254.

With reference to Figure 10, provide another system 1310, except following pointed any exception, this system 1310 can be similar or identical with the arbitrary configuration in the configuration of system 1210 described above.This system 1310 can comprise high side compressors 1312, low-pressure side compressor 1314, outdoor heat converter 1316, first expansion gear 1324, first check-valves 1322, second check-valves 1320, second expansion gear 1318, indoor heat converter 1326, first supplying duct 1328, second supplying duct 1330, low-pressure side suction lead 1332, high-pressure side suction lead 1334 and discharge conduit 1336.High side compressors 1312 can comprise suction inlet 1338 and discharge outlet 1340.Low-pressure side compressor 1314 can comprise suction inlet 1342, discharge outlet 1344 and low tension outlet 1346.Low tension outlet 1346 can be communicated with the suction inlet 1338 of high side compressors 1312 via high-pressure side suction lead 1334.The oil sump (not shown) of high side compressors 1312 with low-pressure side compressor 1314 can be interconnected by lubricant communication conduit 1348.Lubrication control valve 1350 can be arranged along lubricant communication conduit 1348 and can control the lubricant through this lubrication control valve 1350.

First supplying duct 1328 can comprise the first control valve 1352.Second supplying duct 1330 can comprise the second control valve 1354.3rd control valve 1356 can be arranged in downstream, first supplying duct 1328 of the discharge outlet 1340 of high side compressors 1312 and discharge between conduit 1336.4th control valve 1358 can be arranged along discharge conduit 1336.5th control valve 1360 can be arranged in downstream, second supplying duct 1330 of the discharge outlet 1344 of low-pressure side compressor 1314 and discharge between conduit 1336.Control module 1362 can be communicated with valve 1350,1352,1354,1356,1358,1360.Control module 1362 also can control the operation of compressor 1312,1314.

System 1310 can be the heat pump that can run with heating mode and refrigeration mode.In some embodiments; system 1310 can with the first heating mode (wherein; compressor 1312,1314 all runs), the second heating mode (wherein; low-pressure side compressor 1314 is shut down; high side compressors 1312 is run), the first refrigeration mode (wherein; two compressors 1312,1314 all run) and the second refrigeration mode (wherein, low-pressure side compressor 1314 runs, and high side compressors 1312 is shut down) operation.As will be described in more detail below, low-pressure side compressor 1314 internal capacity 1364 can one in the first heating mode, the second heating mode, the first refrigeration mode, the second refrigeration mode or all in be used as to suck accumulator.

When running with the first heating mode that two compressors 1312,1314 all run to make system 1310, control module 1362 can close the first control valve 1352, opens the second control valve 1354, open the 3rd control valve 1356, opens the 4th control valve 1358 and close the 5th control valve 1360.Suction pressure working fluid can be sucked in the internal capacity 1364 of low-pressure side compressor 1314 via the suction inlet 1342 of low-pressure side suction lead 1332 and low-pressure side compressor 1314.The part being sucked into the working fluid of internal capacity 1364 can be compressed by low-pressure side compressor 1314, and discharges via discharge outlet 1344.The another part being sucked into the working fluid in internal capacity 1364 can be sucked in the suction inlet 1338 of high side compressors 1312 via the low tension outlet 1346 of low-pressure side compressor 1314 and high-pressure side suction lead 1334, and can be compressed by high side compressors 1312 subsequently, and be discharged via discharge outlet 1340 by from high side compressors 1312.The another part being sucked into the working fluid in internal capacity 1364 can be accumulated in internal capacity 1364.Working fluid from the discharge outlet 1344 of low-pressure side compressor 1314 can flow through discharges conduit 1336 and converges with via the working fluid of discharging outlet 1340 and leave high side compressors 1312.After this, the working fluid of discharging from compressor 1312,1314 can flow through the 3rd control valve 1356 and flows through indoor heat converter 1326, second check-valves 1320, second expansion valve 1318 and pass outdoor heat converter 1316.Working fluid can flow in the second supplying duct 1330 by heat exchanger 1316 outdoor, and passes low-pressure side suction lead 1332 and flow back in the internal capacity 1364 of low-pressure side compressor 1314.

Shut down with low-pressure side compressor 1314 to make system 1310, the second heating mode that only high side compressors 1312 is run runs, control module 1362 can be closed the first control valve 1352, opens the second control valve 1354, opened the 3rd control valve 1356, close the 4th control valve 1358 and close the 5th control valve 1360.In the second heating mode, the flowing running through system 1310 of working fluid can be similar or identical with in the first heating mode, except working fluid is not compressed by low pressure side compression machine 1314 and via discharge outlet 1344 with discharge except conduit 1336 discharges.

In order to the first refrigeration mode making system 1310 all run with compressor 1312,1314 runs, control module 1362 can be opened the first control valve 1352, closes the second control valve 1354, closes the 3rd control valve 1356, opens the 4th control valve 1358 and open the 5th control valve 1360.As described above, suction pressure working fluid can be sucked in the internal capacity 1364 of low-pressure side compressor 1314 via the suction inlet 1342 of low-pressure side suction lead 1332 and low-pressure side compressor 1314.The part being sucked into the working fluid in internal capacity 1364 can be compressed by low-pressure side compressor 1314, and discharges via discharge outlet 1344.The another part being sucked into the working fluid in internal capacity 1364 can be sucked in the suction inlet 1338 of high side compressors 1312 via the low tension outlet 1346 of low-pressure side compressor 1314 and high-pressure side suction lead 1334, and can be compressed by high side compressors 1312 subsequently, and discharge via discharge outlet 1340 from high side compressors 1312.The another part being in addition sucked into the working fluid in internal capacity 1364 can be accumulated in internal capacity 1364.Working fluid from the discharge outlet 1340 of high side compressors 1312 can flow through discharges conduit 1336 and converges with via the working fluid of discharging outlet 1344 and leave low-pressure side compressor 1314.After this, the working fluid of discharging from compressor 1312,1314 can flow through the 5th control valve 1360, and flows through outdoor heat converter 1316, first check-valves 1322, first expansion valve 1324 and pass indoor heat converter 1326.Working fluid can flow in the first supplying duct 1328 by heat exchanger 1326 indoor, and passes low-pressure side suction lead 1332 and be back in the internal capacity 1364 of low-pressure side compressor 1314.

In order to make the second refrigeration mode that system 1310 is run with low-pressure side compressor 1314, high side compressors 1312 is shut down run, control module 1362 can be opened the first control valve 1352, closes the second control valve 1354, closes the 3rd control valve 1356, closed the 4th control valve 1358 and open the 5th control valve 1360.In the second refrigeration mode working fluid run through the flowing of system 1310 can be similar or identical with in the first refrigeration mode, except working fluid is not compressed by high side compressors 1312 and via discharge outlet 1340 with discharge except conduit 1336 discharges.

Provide the aforementioned description of embodiment for the purpose of illustration and description.This description is also not intended to limit or the restriction disclosure.Each element of particular implementation or feature are generally not limited to this particular implementation, even if but do not illustrate particularly or describe, interchangeable under applicable circumstances and can be used in selected embodiment.Each element of particular implementation or feature also can change in many ways.This change should not be considered to deviate from the disclosure, and this amendment should be included in the scope of the present disclosure.

Claims

1. a heat pump, described heat pump can operate to and make fluid circulate along first direction between the first heat exchanger and the second heat exchanger and circulate along second direction in cooling mode in a heating mode, described heat pump comprises suction lead, low-pressure side compressor and high side compressors, and described low-pressure side compressor and described high side compressors are all communicated with described suction lead fluid.

2. heat pump according to claim 1, also comprises:

Oil-piping layout, the oil sump of described low-pressure side compressor is connected with the oil sump fluid of described high side compressors by described oil-piping layout; And

Control module, described control module controls the valve be arranged in described oil-piping layout.

3. heat pump according to claim 1, also comprise control module, when described heat pump runs with described heating mode, described control module makes the one in described low-pressure side compressor and described high side compressors run, and when described heat pump runs with described heating mode, described control module stops the another one in described low-pressure side compressor and described high side compressors to be run.

4. heat pump according to claim 3, wherein, described control module can operate into when described heat pump runs with described refrigeration mode, described another one in described low-pressure side compressor and described high side compressors is run, and when described heat pump runs with described refrigeration mode, stop the described one in described low-pressure side compressor and described high side compressors to be run.

5. heat pump according to claim 1, also comprises:

Outdoor unit, described outdoor unit comprises the one in outdoor heat converter and described low-pressure side compressor and described high side compressors; And

Indoor unit, described indoor unit comprises the another one in indoor heat converter and described low-pressure side compressor and described high side compressors.

6. heat pump according to claim 1; wherein; described heating mode comprises the first heating mode and the second heating mode; in described first heating mode; described high side compressors and described both low-pressure side compressors all run; in described second heating mode, described high side compressors is run, described low-pressure side compressor shutdown.

7. heat pump according to claim 6; wherein; described refrigeration mode comprises the first refrigeration mode and the second refrigeration mode; in described first refrigeration mode; described high side compressors and described low-pressure side compressor all run; in described second refrigeration mode, described low-pressure side compressor operating, described high side compressors is shut down.

8. heat pump according to claim 1, wherein, during described heating mode, the internal capacity of the one in described high side compressors and described low-pressure side compressor can act as the suction accumulator of accumulating hydraulic fluid within it.

9. heat pump according to claim 8, wherein, during described refrigeration mode, the described internal capacity of the described one in described high side compressors and described low-pressure side compressor can act as the suction accumulator of accumulating hydraulic fluid within it.

10. heat pump according to claim 8, wherein, during described refrigeration mode, the internal capacity of the another one in described high side compressors and described low-pressure side compressor can act as the suction accumulator of accumulating hydraulic fluid within it.

11. 1 kinds of heat pumps, described heat pump can run with the first heating mode and the first refrigeration mode, and described heat pump comprises:

High side compressors, described high side compressors comprises the first suction inlet and the first suction outlet;

Low-pressure side compressor, described low-pressure side compressor comprises the second suction inlet and the second suction outlet;

Discharge conduit, described discharge conduit receives the compressed working fluid from described low-pressure side compressor in described first heating mode, and in described first refrigeration mode, receive the compressed working fluid from described high side compressors.

12. heat pumps according to claim 11, wherein, under described first refrigeration mode, fluid between described low-pressure side compressor with described discharge conduit is communicated with and is prevented from, and under described first heating mode, the fluid between described high side compressors with described discharge conduit is communicated with and is prevented from.

13. heat pumps according to claim 11, wherein, under the second refrigeration mode, the fluid between described high side compressors with described discharge conduit is communicated with and is prevented from, and under the second heating mode, the fluid between described low-pressure side compressor with described discharge conduit is communicated with and is prevented from.

14. heat pumps according to claim 13, wherein, under described second refrigeration mode, fluid between described low-pressure side compressor with described discharge conduit is communicated with and is prevented from, and under described second heating mode, the fluid between described high side compressors with described discharge conduit is communicated with and is prevented from.

15. heat pumps according to claim 14, wherein, during described first heating mode and during described first refrigeration mode, described low-pressure side compressor and described both high side compressors are all run, and wherein, during described second heating mode and described second refrigeration mode, the one only in described high side compressors and described low-pressure side compressor is run.

16. heat pumps according to claim 15, wherein, described high side compressors is run during described second heating mode, and described low-pressure side compressor is shut down during described second heating mode.

17. heat pumps according to claim 16, wherein, described low-pressure side compressor runs during described second refrigeration mode, and described high side compressors is shut down during described second refrigeration mode.

18. heat pumps according to claim 11, wherein, described second suction inlet of described low-pressure side compressor receives the working fluid being in suction pressure, and wherein, described low-pressure side compressor comprises outlet, and the working fluid being in described suction pressure leaves described low-pressure side compressor via described outlet.

19. heat pumps according to claim 11, also comprise suction lead, and described suction lead is communicated with described second suction inlet fluid with described first suction inlet under described first heating mode and under described first refrigeration mode.

20. heat pumps according to claim 19, also comprise the high pressure side conduit with the first control valve and the low-pressure side bypass manifold with the second control valve, wherein, under described first heating mode, working-fluid flow is through described low-pressure side bypass manifold, and under described first refrigeration mode, working fluid is prevented from flowing through described low-pressure side bypass manifold, and wherein, under described first refrigeration mode, working-fluid flow is through described high pressure side conduit, and under described first heating mode, working fluid is prevented from flowing through described high pressure side conduit.

21. heat pumps according to claim 20, wherein, during described first heating mode and during described first refrigeration mode, described low-pressure side compressor and described both high side compressors are all run, wherein, during the second heating mode and the second refrigeration mode, one only in described high side compressors and described low-pressure side compressor is run, and wherein, under described second heating mode, working-fluid flow is through described low-pressure side bypass manifold, and under described second refrigeration mode, working fluid is prevented from flowing through described low-pressure side bypass manifold, and wherein, under described second refrigeration mode, working-fluid flow is through described high pressure side conduit, and under described second heating mode, working fluid is prevented from flowing through described high pressure side conduit.

22. 1 kinds of systems, described system can operate to and fluid is circulated between the first heat exchanger and the second heat exchanger, and described system comprises suction line, low-pressure side compressor, high side compressors and discharge line, described low-pressure side compressor and described high side compressors are all communicated with described discharge line fluid with described suction line.

23. systems according to claim 22, wherein, described suction line fluid is connected to low-pressure side suction inlet and high-pressure side suction inlet.

24. systems according to claim 23, wherein, the housing of described low-pressure side compressor is arranged between described suction line and described high-pressure side suction inlet, make fluid after leaving described suction line, enter described high side compressors before through the suction chamber that limited by described housing.

25. systems according to claim 23, wherein, compressed fluid is supplied to described low-pressure side suction inlet by the discharge outlet of described high side compressors.

26. systems according to claim 23, wherein, described high-pressure side suction inlet receives the fluid of being discharged by described low-pressure side compressor.

27. systems according to claim 26, also comprise the bypass manifold directly connected with described high-pressure side suction inlet by described suction line.

28. systems according to claim 22, wherein, described high side compressors comprises the housing with the first entrance and the second entrance, described first entrance receives the fluid being in the first pressure from described low-pressure side compressor, and described second entrance receives the fluid being in second pressure higher than described first pressure of discharging from described low-pressure side compressor.

29. systems according to claim 28, wherein, described high side compressors comprises compressing mechanism, described compressing mechanism limits at least one compression chamber, at least one compression chamber described receives the fluid from described first entrance, and fluidly isolates with the fluid that described high side compressors receives from described second entrance.

30. systems according to claim 22, wherein, when described high side compressors and described low-pressure side compressor run with approximate absolutely capacity, under the discharge chamber of described high side compressors and the suction chamber of described low-pressure side compressor are in roughly equal pressure.

31. systems according to claim 22, also comprise oil-piping layout, and the oil sump of described low-pressure side compressor is connected with the oil sump fluid of described high side compressors by described oil-piping layout.

32. 1 kinds of compressors, comprising:

Housing, described housing limits the first Room, and described first Room holds the fluid being in first fluid pressure;

First compressing mechanism, described first compressing mechanism comprises the first dynamic vortex and first and determine vortex, and described first moves vortex and described first determines vortex and to be arranged in described first Room and by compressed fluid expulsion in described first Room being in described first fluid pressure;

Second compressing mechanism, described second compressing mechanism comprises and is arranged in the dynamic vortex and second in second in described first Room and determines vortex, and limit suction inlet and discharge outlet, described suction inlet receives the fluid being in described first fluid pressure from described first Room, and the fluid being in second fluid pressure is discharged from described housing by described discharge outlet.

33. compressors according to claim 32, wherein, described housing limits the second Room being in described second fluid pressure.

34. compressors according to claim 33, wherein, described second Room comprises discharge silencer.

35. compressors according to claim 32, also comprise power transmission shaft, and described power transmission shaft is arranged in described first Room, and engage the described first dynamic vortex and the described second dynamic vortex gearingly.

36. compressors according to claim 32, also comprise motor, and described motor arrangement is in described housing and drive the described first dynamic vortex and described second dynamic both vortexs.

37. compressors according to claim 32, also comprise suction lead, described suction lead extends through described housing and engages the suction inlet of described first compressing mechanism, and the fluid being in the 3rd fluid pressure is sent to described first compressing mechanism, wherein, described 3rd fluid pressure is less than described first fluid pressure and described second fluid pressure.

38. compressors according to claim 32, wherein, described housing limits single lubricant pool, and lubricant is supplied to described first compressing mechanism and described both second compressing mechanisms by described lubricant pool.